Games like Fadin's Vacation in the Parallel Kingdom
Games like Fadin's Vacation in the Parallel Kingdom include SANABI, Momodora: Reverie Under The Moonlight, Prince of Persia The Lost Crown, Skul: The Hero Slayer, and Blasphemous 2. We matched them by the tags players give Fadin's Vacation in the Parallel Kingdom on Steam (Adventure, Action, Casual, Action-Adventure, and Side Scroller): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Action · Adventure · 2D Platformer

Momodora: Reverie Under The Moonlight
Shared: Metroidvania · Side Scroller · 2D Platformer

Prince of Persia The Lost Crown
Shared: Action · Adventure · Metroidvania

Skul: The Hero Slayer
Shared: Action · 2D · Metroidvania

Blasphemous 2
Shared: Adventure · Metroidvania · Side Scroller

Rabi-Ribi
Shared: Metroidvania · Action-Adventure · Side Scroller

Gato Roboto
Shared: Action · Adventure · Metroidvania

Monster Boy and the Cursed Kingdom
Shared: Adventure · Action · Metroidvania

Gensokyo Night Festival
Shared: Action · Casual · Metroidvania

Ori and the Will of the Wisps
Shared: Action · Metroidvania · Adventure

Sonic Superstars
Shared: Action · Adventure · Casual

Well Dweller
Shared: Action-Adventure · Action · Metroidvania

Pikuniku
Shared: Adventure · Casual · Action

Dead Cells
Shared: Adventure · Metroidvania · 2D

Owlboy
Shared: Adventure · Metroidvania · Action

Iconoclasts
Shared: Action · Adventure · Metroidvania

Sonic Origins
Shared: Action · Adventure · 2D Platformer

Tribal Hunter
Shared: Action · Action-Adventure · Casual

Pizza Tower
Shared: 2D Platformer · Action · Cartoony

The Messenger
Shared: Metroidvania · Action · 2D

TEVI
Shared: Metroidvania · Action-Adventure · Side Scroller

Axiom Verge 2
Shared: Adventure · Action · Metroidvania

Broforce
Shared: Action · 2D · Side Scroller

Super Mombo Quest
Shared: Adventure · Action · Metroidvania